首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   3445篇
  免费   217篇
  国内免费   96篇
财政金融   133篇
工业经济   190篇
计划管理   633篇
经济学   804篇
综合类   510篇
运输经济   25篇
旅游经济   55篇
贸易经济   453篇
农业经济   371篇
经济概况   584篇
  2024年   10篇
  2023年   83篇
  2022年   135篇
  2021年   149篇
  2020年   147篇
  2019年   88篇
  2018年   64篇
  2017年   79篇
  2016年   88篇
  2015年   128篇
  2014年   287篇
  2013年   270篇
  2012年   344篇
  2011年   377篇
  2010年   267篇
  2009年   256篇
  2008年   238篇
  2007年   202篇
  2006年   182篇
  2005年   123篇
  2004年   69篇
  2003年   38篇
  2002年   36篇
  2001年   27篇
  2000年   12篇
  1999年   15篇
  1998年   5篇
  1997年   8篇
  1996年   12篇
  1995年   4篇
  1994年   2篇
  1993年   2篇
  1992年   1篇
  1991年   4篇
  1990年   1篇
  1985年   1篇
  1984年   2篇
  1983年   1篇
  1982年   1篇
排序方式: 共有3758条查询结果,搜索用时 15 毫秒
51.
In this research, we analyze the evolution of the international air transportation country network from 2002 to 2013 with two perspectives: The network’s physical topology and the functional network with traffic information. Our analysis shows that the network is scale-free and has the small-world property. The evolution of triadic properties suggests that the network gears towards symmetric, transitive closure. We find that United States, Great Britain, and France are critical from both perspectives; Surprisingly, South Africa is particularly critical from topological point of view. Furthermore, topological and functional criticality are highly correlated to the GDP of a country.  相似文献   
52.
从当前发展现状来看,新型农村金融组织与县域经济未能互生互长,协同发展.在此情形下,建立新型农村金融组织与县域经济协同发展机制对推进两者互动发展有着重要的实践指导意义.在对新型农村金融组织与县域经济协同发展概述的基础上,分析两者协同发展要素,探讨两者协同发展的一般模式,深入研究两者协同的理想模式——门槛条件下新型金融组织深化的内生增长模型,并制定出两者协同发展路径.  相似文献   
53.
《Telecommunications Policy》2017,41(10):931-947
Over the past two decades, China’s telecommunications industry has witnessed drastic market reform, steadfast institutionalization, and volatile technological changes, which have driven exponential industry expansion. This paper offers an updated longitudinal and comprehensive review on this reform process on the eve of 5G (the fifth generation mobile communications networks). First, the paper segments the two-decade reform crusade into discernible phases, each of which is embedded with different policy drives. These reform phases are then pattern-matched against the subtleties of the overall institutional, technological, and market backdrop. A series of policy issues are identified through a systematic examination of industry phenomena over the reform course. Finally, the status of research is assessed regarding China’s telecom industry and reform, based on which, knowledge gaps are identified and future research agenda suggested. Conclusions are made regarding future reform and research imperatives. The paper advances the understanding of China’s telecom reform, development, and the underlying policy issues. It updates and expands previous works on similar topics. Overall, this study provides important theoretical, managerial, and policy implications.  相似文献   
54.
Recently, dramatic flood disasters have occurred incrementally in several regions of the world. Land-use change as one of the main affecting factors becomes a key component in flood risk management. This study strives to deal with quantifying how changes in land use to affect the dynamic evolution of flood vulnerability. The floodplains of Wuhan, which are located in the Yangtze River Basin, have been selected as an example. In this paper, we use GIS to gather different historical geometric data as sources of land-use information. By proposing the Simpsons-dominance index and location index to analyze the characteristics of land-use changes, and building a quantitative model to measure flood vulnerability, a series of flood vulnerability maps demonstrate differential flood vulnerability of floodplains of Wuhan in three inundation scenarios and four historical periods. Finally, the non-parametric correlation is used to reveal the interactive effect of land use and flood vulnerability. Based on this study, comprehensive flood disaster management strategies for land-use planning are proposed for government decision-makers to reduce the flood vulnerability of Wuhan in future.  相似文献   
55.
《价值工程》2014,(7):178-179
黑色旅游是是近年来国内外,特别是欧美地区旅游学界新兴的热点研究领域,也是一个颇具争议的领域。本文探讨了开发黑色旅游的可行性及营销策略。  相似文献   
56.
This research uses the Lotka–Volterra model to analyse the competition of innovation resource between two enterprises and studies the dynamic effects of environmental changes through the change of model parameters. The research finds that there are three possible results of the competition in innovation resource. That comprises ‘crowding out effect’, ‘unstable equilibrium’ and ‘stable equilibrium’. The results of competitive evolution are determined by enterprises’ interaction parameters. However, the natural growth rates, the initial resource possessions of both enterprises and the amount of regional innovation resource have a significant impact on the evolution of competition.  相似文献   
57.
Recent empirical assessments revealed that footprint indicators calculated with various multi-regional input–output (MRIO) databases deliver deviating results. In this paper, we propose a new method, called structural production layer decomposition (SPLD), which complements existing structural decomposition approaches. SPLD enables differentiating between effects stemming from specific parts in the technology matrix, e.g. trade blocks vs. domestic blocks, while still allowing to link the various effects to the total region footprint. Using the carbon footprint of the EU-28 in 2011 as an example, we analyse the differences between EXIOBASE, Eora, GTAP and WIOD. Identical environmental data are used across all MRIO databases. In all model comparisons, variations in domestic blocks have a more significant impact on the carbon footprint than variations in trade blocks. The results provide a wealth of information for MRIO developers and are relevant for policy makers designing climate policy measures targeted to specific stages along product supply chains.  相似文献   
58.
何寿奎 《企业经济》2020,(1):5-11,F0002
本文以交通运输业高质量发展与环境保护融合为导向,分析交通运输业高质量发展与环境保护现状,阐述交通运输业高质量发展与环境保护融合的内在机理,剖析交通运输高质量发展与环境保护融合的政策驱动、绿色发展需求驱动、优质服务动力、转变发展动力、技术创新动力、利益补偿动力等外部融合动力机制,以及行业竞争力动力、基于绿色发展的组织管理制度创新、绩效驱动等内部融合动力机制。研究建议提出:构建低碳交通技术标准体系,健全基于环境保护的交通建设运营治理机制;探索低碳交通与环境保护成本补偿制度,优化交通运输业产业结构,推动交通运输行业技术升级;建立公路建设与运营环境风险智能控制机制,应用智能技术对交通运输业环境进行协同治理。  相似文献   
59.
This article investigates the post‐entry implications of pre‐entry technological choices made during the uncertain period before a dominant design. Building on work on technological dynamics and organizational inertia, I argue that too early commitments to the winning technology may impede the ability to bring the best product to market, but delaying investment too long limits the ability to accumulate useful knowledge. Using data from the evolution of the flat panel display industry from 1965 to 2005, the study shows empirical support for the two theoretical mechanisms and offers the surprising result that firms starting in the losing technology before switching outperform other firms in terms of product value. Switching, while difficult behaviorally in recovering from failure, both delays difficult‐to‐reverse technological commitments and develops market knowledge. Copyright © 2013 John Wiley & Sons, Ltd.  相似文献   
60.
杨少昆 《价值工程》2014,(32):233-234
通过我国目前技能型紧缺人才的现状分析,对未来几年技能型紧缺人才的状况与演变趋势加以研究和讨论,进一步提出我国的技能型人才的短缺已成为制约我国经济发展的瓶颈。  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号